Description

Diy Improved Version For Marantz 7 Electronic Tube Preamplifier With VU Meters Technical parameters (SPECIFICATIONS) Tube Used JJ ECC83 x2 ,JJ ECC82 x2, 6Z4 x2. 1, the input sensitivity (Input sensitivity): 200mv 2, the output voltage (Voltage output): 2V (RMS THD <0.03%) 3, the signal to noise ratio (S / N Ratio): 95DB 4, the frequency response (Frequency Response): 10Hz-50KHz (-0.5DB) 5, the input impedance (Input Impedance): 250Kohm 6, the output impedance (Output Impedance): 600ohm 7, the input voltage (AC Input): 220V 8 Power consumption (Power Consumption): 50W 9, volume (Dimension): 360 * 170 * 120 (mm) (WDH) 10 Weight (Net Weight): 5.5KG Product features and technical parameters: Circuit: Using the improved principle circuit of Hotan original version; excellent PCB circuit design, reasonable, regular, symmetrical device layout, strictly following the single-point grounding routing. Chassis: A dedicated chassis specially designed for the Hotan pre-stage, with a fully aluminum solid core knob. The entire box is made of aluminum, Transformer: A horizontal transformer with a power of 120W (EI8642/H50 chip) with a side cover is used. The primary and secondary windings are strictly shielded, and advanced vacuum varnishing methods are used at home and abroad to achieve a transparent and tight varnish. The power filament/left/right channel filaments are separately powered by independent windings to prevent mutual crosstalk Potentiometer: Original 16-type potentiometer from Japan ALPS